Water-tube boiler.



No. 850,358. PATENTED ARR.16, 19o?.

s. ELLIOTT. WATER TUBE BOILER.

APPLICATION FILED` JUNE 15. 1906.

2 SHEETS-SHEET 1.

l I I @u A.. 5N Inu /A-'r'roRNE'YS No. 850,358. PATENTED APR. 16, 1907.

W. S. ELLIOTT.

WATER TUBE BOILER. APPLICATION FILED JUNE 1E, 1908.v

2 SHEETS-SHBET 2.

yvl-rNEsSES: I /0 x l AT-T'O R N EYE Umani) "STATES en rENT orrionjf ELLIOTT. or Prr'rsBURe, PENNsYLvANL/i. A

passasse y c whichfthe 4followingis a speciiication.

invention relates to water-tube boilers; and its object is to provide a boiler of this type which shall have a definite circulation in its feed section, chamber, or compartment andw'hich` has such connections with the remainder'of the boiler as will permit no cycle ofcir'culation therewith, but will supply thereto water as it is evaporated-therefrom.

. Another object is to providea maximum heatirnig-surfacel within a given setting and at the Sametime to utilize a portion of this addi'- tional surface as a support for the roofof the fire-chamber. Y

These andother'objects will appear in the f'descri" tion following.

Re en'ing to thefdrawings which consti.- tute' a art of this specification, Figure 1 is a 'vertica Isection taken on 1 1 of Fig. 2, and Fig. 2 is partlyga front elevation and partly a crosssection-on the line 1 1 11 of Fig.. 1.

'Onfthe'drawings; 1 represents an upper steamv andwater'drum or receptacle extendinginthe type Offboilerfshown preferably from the front to the rear wall but it is to be understood that my invention vis notl restricted toboilers like theone shown when tliepijnciples which distinguishes my invention are employed. A

v2 is Va e 'lower Water drum or receptacle, which? isfshown as, extending from the rear wall preferably' tothe rear side of the bridgewall 3, which extendstransversely of the setting and is placed suiiiciently tothe rear to provide the required space for the nre-box` 4,-

oneofthegrate-bars' thereof being shown at 5.

lThe drums 1 andfZyare shown arallel and connected 4together several ongitudinal rows of tubes. yI have shown eight of these f ro'ws; but the numbe'of'rows may be varied, 1 and the manner of connecting them With the, f drums'm'ay be by 'means of curved tubes, as

showmor by any other suitable expedient.

' "I have shown two baffle-walls 7 and'8, the

-form'er p'assingfbetween thev fourth and fth f transverse rows oftubes 6 and extending fromA the drunafzlnpwardly, so as to leave the -"space 9 between its lip redge and thedrum --1 for' the passageoft e heat. andfurnacel Specification of Letters Patent. Application ned` June, 15, 190e'. sain No. 321,236.'

.Patented April v1c,l 1907i gases. The bathe-wall 8 is shown between the eleventh and twelfth transverse rows of I vtubes 6 and extends downwardly from theV l,drum 1, so as to leave the space lbetween its lower edge and the drum 2 for the passage of the heat and furnace-gases. I havethus divided the space occupied'by the tubes 6 into three serial passes-namely, the upv-pass 11,l the down-pass 12, and the up-p'ass 13-from which the gases pass around the drum 1- into the stack connection 14.

In the, drum 1 I have placed the transverse partition 1 5, which I have shown in a plane .between the tenth and eleventh of the transverse rows of tubes 6, this partition being provided above the water-line with .holes i16 in order to connect the steam-spaces of the two compartments or lreceptacles of the drum, the front compartment or receptacle being designated-1`7 and the rear 19.

I divide the drum l2 into the compartments 20 and 21 by means of the transverse partition 22, which is placed so as to leave in the rear thereof one ormore transverse rowsl` of tubes' in front of the partition 15. I have shown the partition`22 between the ninth and ing of the baffle-walls so as to leave any definite number of tubes in the front or the rear thereof. The front'baiiie-wall should divide lthe tubes'connec-ted'to'the compartment 18 into two sections, and the rear baffle-wall shall likewise divide the tubes connected to Ithe' compartment 19into two sections. The vpartition' 22 should `be placed as above described Ihe word compartment is not to be limited to a divisionof a drum, but includes as lwell distinct se arate drums however arranged, provide they are so relatedand connected bytubes to securethe circulation and other functions by means substantially equiv? 1 alent. i

Vof thedrum 1 are the tub connected, by means of 'the'.in tion-boxes. 26, to the; frontend' 27,1. which are inclined .1 rl'ara lwardly above the fire-box 4 and 1in-ally are bent upwardly and enterthe drum 1 in front of the tubes 6. supported on the inclined portion of the tu lIO The roof 28 of the' iire-box is es 27, the space above the roof 28 receivheat through the roof and between the .11.1 y tues 27 beyond the rear end, of the roof.

The' front end of the boiler is thus placed where there will be but slight agitation due to the escape of steam-bubbles through the water,- and itis from this portion of the drum that I prefer to take 'the steam for use, the

pipe 29beipg the steam-outlet, which may be.

Joined by a similar pipe from a second boiler or pair of drums or their equivalents in the same or different settings.

The junction-boxes 26 are provided with the endcaps 30,l which are within the open a pockets. 31, yinto which a tool may be adpass 11, through the passage 9, d own among the tubes in the pass 2, through the passage -p among the tubes in the pass 13, and

O -'through the connection 14 into the stak. This course of lthe gases will cause f. tliejl tubes in pass 1 1.to be heated more highly -thanf'those'in the pass 12 and those in the i .rla'tterjv pass to be heated more highly than inf-those tubes in the pass 12 that are con- "fnec'ted to the drum or compartment 20, an

-those-.in the pass 13. This inequalityof heatiny cause an upflow of water in the tu es6 of the pass 11, a downflow of water ftpfl'ow those tubes in the pass 12 that "-c'ormected to the drum or compartment and a downlow in the tubes in the pass Thus there will be a cycle of circulation y fof water from the drum or compartment 19 down the tubes in the rear of the baille-wall 8 t0 lthe drum or compartment 21 and up some of the tubes in front of the baiiie-wall S to the drum or compartment 19. The circulation in Athis cycle will be suliciently slovr to permit' the foreign matter in the water to settle in the mud-drum 21 and yet sufficiently fast to keep the tubes well wetted to prevent their burnin Allscale formed in this cycle will also sett e in the drum 21.

A cycle of water circulation will exist in front of the partition 15 or its equivalent, the Iwater passin up from the drum or compart- Inent 20 in ont or' the baffle-wall 7 to the drum or compartment 18 and down the tubes atnthe rear of the said baHle-wall and in front of the partition 22 or its equivalent to the drum or compartment 20.

The tubes between the partitions 15 and 22 supply Water from the rear cycleV to the front cycle as fast as it is removed f rom the latter. The upilow in these tubes will therefore be slow, and the water'transmitted by them will .be comparatively free Jfrom sediment and scale.

A third cycle of water circulation will evidently exist from the drum or compartment 18, down the tubes 25, through the junctionboxes 26, and up the tubes 27 to the said drum or compartment 18. This cycle is added to the other parts ol the boiler without any additional depth of the boiler-setting, as it is entirely ov er thegrate. Not only is this additional heating-surface provided, but a support is already provided for the roof of the lire-box, which saves the construction of' arches and otherwise simplifies the construction. Even witl'iout the said third cycle the remaining features of my invention would in no wise be sacrificed, as they would act subs'tantially the same whether this cycle were present or absent.

I claii 1. In a boiler, an upper drum, a partition therein dividing 'the same into front and rear compartments, a lower drum,'a partition dividing the same into front and rear compartments, tubes connecting the front compartments, tubes connecting the rear compartments, tubes connecting the lower rear compartment and the upper front compartment, and a baffle between the tubes commento the rear compartments,

2. In a boiler, an upper drum, apartition therein dividing the same into front and rear compartments, a lower drum, a partition dividing the same intofront and rear compartments, tubes connecting the front compartments, tubes connecting Ithe rear compartments, tubes connecting the lower rear compartment and the upper front compartment, and means for causing a cycle of, circulation between the said rear receptacles.

3. In a water-tube boiler, upper frontfand rear receptacles, lower front and rear receptacles, tubes connecting the front upper `'and lower receptacles, tubes connecting the rear IOO upp'er and lower receptacles, tubes connect- A ing the rear lower receptacles with the u per front receptacle, bafliing dividing the rst-v named tubes,-andbaffling dividing the secondnamed tubes soas to cause two cycles of circulation.

4. In a water-tube boiler, an upper front and rear receptacle, a lower'front and rear receptacle, tubes connecting the front upper receptacle with the front lower receptacle, tubes connecting the rear upper receptacle A with the lower rear receptacle, and means for causing an up and down circulation in the tubes connecting the rear receptacles and an up and down circulation in the tubes connecting the front receptacles.

5. In a water-tube boiler, an upper front and rear receptacle, a lower front and rear receptacle, tubes connecting the front upperreceptacle with the frontlowerreceptacle,

' causing an up ltubes connecting the rear upper receptacle with the lower rear recept'ac e, means for and down circulation in the tubes connecting the rear receptacles and an up and down circulationin the tubes connecting the front receptacles, and means for supplying water from the lower rear receptacle to the front upper receptacle.

6. In a Water-tube boiler, a lower muddrum, an upper steam and water drum parallel therewith, a furnace in front of the muddrum, junction-boxes located between the levels of the mud-drum and the steam and water drum, and tubes connected at their lower ends to said junction-boxes and alt their upper ends to the upper steam and water drum, one of the tubes connected to each junction-box forming' a part of the roofof the furnace.

7. In a water-tube boiler, a lower muddrum, an upper steain and water drum parallel therewith, a furnace in Jfront of the muddrum, junction-boxes located between the levels of themud-drum and the steam and water drum, and tubes connected at their-lower ends to said junction-boxes and. at their upperends to the upper steam and water drum, one of the tubes connected to each junctionboX- forming a part of the roof ofthe furnace and supporting the vfurnace-covermu 8- ln a Water-tube boiler, steam and water drums, mud-drums parallel thereto, watertubes connecting steam and water drums and the mud-drums, a furnace in front o1 the mud-drum, junction means near the front Wall, tubes connecting it to different portions` of the steam and Water drums and extending' over the furnace, and baffle-plates above the said junction means and over the furnace.

9. In a water-.tube boiler, steam and wat '-i drums, mud-drums parallel thereto, Water' tubes connecting steam an'd water drums ai: i the mud-drums, afurnace in 'ront of the mu( idrum, a series of Water-chambers near the front wall, tubes connecting' these chambers to dilTerent yportions of the steam. and )rater drums and extending over the. furnace, and baHie-plates above the tubes and overtl1e1urnace.

Signed at Pittsburg, Pennsylvania, this 7th day of June, 1906.

WILLIAM S. ELLIOTT.

Witnesses:

F. N. BARBER, C. E. EGGERS.. 

